STPolyFromText (geography Data Type)
Returns a geography instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation augmented with any Z (elevation) and M (measure) values carried by the instance.
Składnia
STPolyFromText ( 'polygon_tagged_text' , SRID )
Arguments
polygon_tagged_text
Is the WKT representation of the geography Polygon instance you wish to return. polygon_tagged_text is an nvarchar(max) expression.SRID
Is an int expression representing the spatial reference ID (SRID) of the geography Polygon instance you wish to return.
Return Types
SQL Server return type: geography
CLR return type: SqlGeography
OGC type: Polygon
Uwagi
This method throws a FormatException if the input is not well-formatted.
Examples
The following example uses STPolyFromText() to create a geography instance.
DECLARE @g geography;
SET @g = geography::STPolyFromText('POLYGON((-122.358 47.653, -122.348 47.649, -122.348 47.658, -122.358 47.658, -122.358 47.653))', 4326);
SELECT @g.ToString();